Use the Sensor Ally smartphone app to update your Heart Rate Flow Sensor to the latest firmware version.
Download the Sensor Ally app for Android
Download the Sensor Ally app for iOS
Lezyne Heart Rate Sensor
HR FLOW SENSOR – BLACK
High performance, comfortable heart rate monitor. Conforms 100% to Bluetooth Smart standards for max compatibility. Durable, lightweight polycarbonate construction with translucent body. Flexible strap made from athletic materials. Replaceable CR2032 coin cell battery optimized for long-lasting use.